Doctor insights on:
Sugar In Urine But Not In Blood

1

It's possible:
Hi. Odd question. It's possible to have a serum glucose over 200 with none in the urine, but the higher above 200 the serum glucose gets, the less likely none shows up in the urine. It has to do with the tubular threshold for glucose, which does show a bell-shaped curve distribution.
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Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart the yellow color (urobilin).
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2

Higher is worse:
Hi. High blood sugar is bad for you. As blood sugar gets higher and higher, it starts to come out in the urine. The higher the blood glucose, the worse it is for you. Therefore, you could say that high blood sugar with sugar in urine is a higher blood sugar than high blood sugar without sugar in the urine, and is therefore worse for you. Basically, the higher the blood sugar the worse it is.
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4

Could be:
If you were still spotting at the time of your pee test, even small amounts of blood penetrating in the urine could alter it and give a false positive reading. I'd recommend a repeat testing.
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5

Probable bacteruria:
Possible to have a UTI without white cells in urine. Nitrite urine test is usually only positive in presence of bacteria. Suggest you get a urine culture to delineate a uti, identify bacteria & which antibiotics will eliminate them.
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6

Protein in urine:
Kidney disease can create protein in the urine, even when blood protein levels are normal. Also, a small percentage of patients with normal kidneys will have trace amounts of urine proteins. A 24 hour urine collection for protein is usually done to detect what is called "nephrotic syndrome" or spilling urine protein excessively. Please see your doctor.
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7

Several reasons:
First of all urine tests are prone to false positives, meaning you are not pregnant but it shows you are. In addition, it may be a low value and an early miscarriage and even a blood test a day later is already negative.
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8

Ketones can be :
Concentrated in the urine any time you go for a significant period of time fasting. The concentration depends upon your state of hydration and amount of urine production. Some people spill glucose into the urine without elevated blood sugar due to genetic defects. Most don't spill until glucose greater than 189-200.
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9

Blood in urine:
Blood in the urine is never normal. See a urologist for appropriate testing and treatment. The least pathologic thing it could be is a urinary tract infection. See a urologist to get an answer to your question and to formulate a treatment plan.
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10

Probable bacteruria:
Possible to have a UTI without white cells in urine. Nitrite urine test is usually only positive in presence of bacteria. Suggest you get a urine culture to delineate a uti, identify bacteria & which antibiotics will eliminate them.
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11

Heal:
No it is not normal but surely your doctor has described everything to you and helped you start improving from your symptoms.
If the doctor has not treated as you would like, have a friend refer you to a different doctor.
Please let me know how things go.
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12

Low threshhold:
Ordinarily the kidney does not spill sugar into the urine until the blood level reaches about 180. However, if this kidney threshhold happens to be set at a much lower level, the sugar will begin to spill at a much lower level. This goes by the scientific name of renal glycosuria and has no relation to diabetes.
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13

See comment:
What were your symptoms ? Why was a urine test done? Negative culture means no bacteria , but it depends on how it was cultured...Tuberculosis needs special culture...Sometimes a foreign body like stone a polup may shed wbc, s ; rbc, s, yet culture can be negative !;i
in medicine the most important part in tne diagnosis in the history.
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14

No.:
Unless the urine is contaminated from menstrual blood, there should not be any blood in the urine. There are many causes, but the most frequent is urinary tract infection. If there truly is blood in your urine, you should see a doctor to find out why.
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15

Few issues:
It is abnormal to have blood in thevurine. So this must be accounted for. Now if you are on a period or kidney stones this may account for the blood. But must know the cause. So hydrate well and go back to doctor for another sample to see if the blood is gone. If not you may have to do further testing
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17

Always abnormal:
Any amount of blood in the urine is abnormal and is a little more ominous if you can see it suspended in the urine. There are many sources from benign to very serious possibilities. You should either see your family doctor or a urologist right away for this.
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19

Diurnal variation:
Blood levels of cortisol vary during the day. 24 hour urine levels provide a better status of adrenal function. Beyond that, you need to consult with an endocrinologist as the issue is not suitable for this forum.
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20

No.:
Leukopenia is a low white blood cell count in blood. It has nothing to do with changes in the urine. Leukocytes and protein in the urine can have many causes. Some are simple like infection or kidney stones, but there are many other causes. This should be evaluated by a kidney specialist if it persists.
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21

Blood sugar swings:
Sugar in the urine means that the blood sugar has been over 180 in the past few hours or since the last time someone urinated. So, by the time they urinate and find there is sugar in the urine, the blood sugar may have gone down to normal.
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22

Peads endo consult:
Your child needs to be in follow up of well trained pediatric endocrinologist.
Without knowing more specific details i could not give you more information.
There could be several causes for low calcium in this age group and this needs to be worked up and he should be receiving appropriate calcium supplementation and may also require Calcitriol ( active form of vitamin d) based on the diagnosis.
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23

Low threshhold:
Ordinarily the kidney does not spill sugar into the urine until the blood level reaches about 180. However, if this kidney threshhold happens to be set at a much lower level, the sugar will begin to spill at a much lower level. This goes by the scientific name of renal glycosuria and has no relation to diabetes.
...Read more

24

Possible diabetes:
You see this in diabetes and a few other conditions. I assume since you know there is sugar in the urine you are seeing a physician. If not, you should make appt. With pcp. www.peedoc.com @thepeedoc.
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Ok to wait:
Im not sure if you indeed have diabetes based on data you provided. I have seen many times positive urines for glucose yet endocrine workup is negative for diabetes (urine contamination with sugar perhaps ?) or if your kidneys tend to.
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27

It's possible:
Hi. Odd question. It's possible to have a serum glucose over 200 with none in the urine, but the higher above 200 the serum glucose gets, the less likely none shows up in the urine. It has to do with the tubular threshold for glucose, which does show a bell-shaped curve distribution.
...Read more

28

Higher is worse:
Hi. High blood sugar is bad for you. As blood sugar gets higher and higher, it starts to come out in the urine. The higher the blood glucose, the worse it is for you. Therefore, you could say that high blood sugar with sugar in urine is a higher blood sugar than high blood sugar without sugar in the urine, and is therefore worse for you. Basically, the higher the blood sugar the worse it is.
...Read more

29

High blood sugar:
is dangerous depending upon how high and for how long -- not whether it appears in the urine or not. Blood sugar can easily be 2 or even 3 times normal before appearing in the urine.
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30

Evaluate at hospital:
A 3 year old who is truly lethargic and unresponsive should be evaluated at a hospital (such as a children's hospital), arriving there by ambulance. Doctors there will do various tests to see whether or not blood sugar levels are the cause of the symptoms.
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Follow up :
Would follow up for further testing. Does not sound like just “muscle pains.” More sensitive tezting to rule out cardiac cause such as potentially a cardiac stress test and to look for other sources likely indicated.
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33

Normal:
The albumin/creatinine ratio (ACR) urine test is used to detect the presence of abnormal amount of protein (albumin) in the urine which is often an early sign of kidney disease and an important prognostic marker in pts with diabetes and hypertension and a risk factor for cardiovascular disease. Your results (ACR 17 mg/dl and serum creatinine 0.6) are indicative or normal kidney function.
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34

Concern about diabet:
There is a threshold in the kidney at which sugar in the blood spills over into the urine in all persons. When it becomes measurable the most common concern is diabetes mellitus which literally means "sweet urine.".
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35

Usually diabetes.:
One of the functions of the kidney is to absorb all sugars into the bloodstream & prevent their excretion in the urine. Diabetes, or conditions where blood sugar is very high, can overwhelm the kidney's ability to reabsorb glucose, causing it to spill out into the urine, a condition called glycosuria. Though diabetes is the most common cause, rare defects in kidney function can cause this as well.
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38

See below:
Glucose in urine also known as 'glycosuria' is mostly seen in diabetes mellitus with elevated blood sugar. Very very rarely ( 1 in 1000 or even less) it is seen in a defect of kidney known as fanconi syndrome.
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Glucose in urine also known as 'glycosuria' is mostly seen in diabetes mellitus with elevated blood sugar. Very very rarely ( 1 in 1000 or even less) it is seen in a defect of kidney known as fanconi syndrome.
...Read more